We are allowed to feel what we want to feel. It's all over that you should have no regrets but I think it is perfectly fine to feel that you regret doing some things in your life. But, at least now, you know your worth (but not saying you didn't then... these situations are just harder when you are younger) and you won't allow anyone to walk on you! I regret some things in life and even though they taught me a good lesson, I'd rather erase them from my memory!